One vertex per element, one color per generator, with an edge from x to x·s.
(1,2,5,4)(3,7,8,6)(9,10,12,14)(11,13,16,15)(17,18,23,20)(19,24,27,28)(21,25,35,31)(22,32,36,26)(29,37,33,39)(30,42,41,38)(34,44,46,40)(43,48,45,47)(1,3,5,8)(2,6,4,7)(18,20)(19,27)(25,31)(26,32)(29,33)(30,41)(40,44)(43,45)(9,10)(11,15)(12,14)(13,16)(17,19)(18,24)(20,28)(21,33)(22,30)(23,27)(25,39)(26,38)(29,35)(31,37)(32,42)(34,45)(36,41)(40,48)(43,46)(44,47) involution — undirected(9,11)(10,13)(12,16)(14,15)(17,20,23,18)(19,28,27,24)(21,31,35,25)(22,32,36,26)(29,39,33,37)(30,42,41,38)(34,44,46,40)(43,48,45,47)(1,2,5,4)(3,6,8,7)(17,21,23,35)(18,25,20,31)(19,29,27,33)(22,34,36,46)(24,37,28,39)(26,40,32,44)(30,43,41,45)(38,47,42,48)(1,4,5,2)(3,7,8,6)(17,22,23,36)(18,26,20,32)(19,30,27,41)(21,34,35,46)(24,38,28,42)(25,40,31,44)(29,43,33,45)(37,47,39,48)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.